People of South Asian origin are at increased risk of having diabetes and of developing heart disease. The issues of screening are thus particularly relevant to this population. However, all of the populations currently recruited to ADDITION are predominantly Caucasian. The ADDITION-Leicester study will assess the feasibility of systematic screening in a South Asian population, will quantify the effect of intensive treatment in people with screen detected diabetes on modelled cardiovascular risk at 1 year and will assess the economic and psychological costs of screening and intensive treatment. This study population will then contribute to the ADDITION-Europe study, which as a whole is powered to assess the impact of screening and intensive treatment on 5 year cardiovascular outcomes.